retry reading session keyring if it grows

This commit is contained in:
Ilya Priven
2026-10-14 00:19:57 +00:00
parent cef1b2f5dc
commit b85e4988b5

View File

@@ -35,18 +35,18 @@ void
fork_session_keyring(void)
{
int32_t *keys = NULL;
long size, n = 0, i;
long size = 0, n, i;
size = syscall(SYS_keyctl, KEYCTL_READ, KEY_SPEC_SESSION_KEYRING, NULL,
0);
if (size > 0) {
keys = xmalloc(size);
/* KEYCTL_READ returns the full size; retry if keys were added. */
for (;;) {
n = syscall(SYS_keyctl, KEYCTL_READ, KEY_SPEC_SESSION_KEYRING,
keys, size);
if (n > size)
n = size;
n = n > 0 ? n / sizeof *keys : 0;
if (n <= size)
break;
size = n;
keys = xrealloc(keys, size);
}
n = n > 0 ? n / sizeof *keys : 0;
/*
* Link the current session keyring into the thread keyring so we still